code: def setUp(self):
      t_upper = 3 if self.label_num is None else self.label_num
      self.y = numpy.random.uniform(-1, 1, self.y_shape).astype(
          self.dtype
      )
      self.t = make_ground_truth(
          t_upper,
          self.t_shape,
          self.ignore_label,
          self.has_ignore_label,
          self.label_dtype,
      )
      self.check_forward_options = {}
      if self.dtype == numpy.float16:
          self.check_forward_options = {"atol": 1e-4, "rtol": 1e-3}
  
file_path: chainer/tests/chainer_tests/functions_tests/evaluation_tests/test_classification_summary.py
imports: import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer import functions
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 1 for calling the TestClassificationSummary obj's underlying member method code with example usage: obj.setUp() without return types